I'm trying to get started making my first mod following this tutorial series: https://www.youtube.com/watch?v=tDj58Ato6v8

After creating my first block when trying to launch it I get this error which I don't fully understand: https://pastebin.com/giuLSAU4
And a notification simply saying "failed to load mod null"
Would love some help I'm not sure what I did wrong

1. Show your code

2. Full crash log

Here's the relevant code let me know if anything else I should have included https://pastebin.com/SK64dWih
The whole latest.log https://pastebin.com/hd2cCj1D
and what the client shows:

Thanks for the reply and help! 💜

Show your main class as well

botmod.java https://pastebin.com/X9723tbd

The classes should always starts with a capital letter, and you have an extra comma here

"heart_block,"

Oh my gosh I don't know how I never noticed that comma thank you so much.
💜💜